= Query by specification
* https://github.com/jeroenvs/querybyspec

== DESCRIPTION

Enables users to query the data storage by specification:
Repository<Person> persons = new PersonRepository();
Specification<Person> isGoldMember = spendsAtleast(500).and(memberSince(2005));
List<Person> goldMembers = persons.matching(isGoldMember);

== FEATURES    

- Specification library
Provides a wide variety of default specifications, based on the type-safe specification
interface, as described by Martin Fowler. These specifications, for one, include:
 * equality
 * compare (gt,lt)
 * composition (and,or,not)
 
not(and(or(x,y),z)).isSatisfiedBy(candidate);
 
In addition we provide a utility class for specifications, which allows specifications
to be used for the selection and counting on iterable objects. 

Specifications.findAllSatisfying(isGoldMember, members);
Specifications.countAllSatisfying(isGoldMember, members);
Specifications.isSatisfiedByAll(isGoldMember, members);
Specifications.isSatisfiedBySome(isGoldMember, members);

- Repository library
Repositories can be used to find entities, matching a certain specification.
This allows us to do the following:

Repository<Person> persons;
List<Person> matches = persons.matching(spec);

By default our library provides two repository strategies:

* In memory strategy
new InMemoryRepositoryStrategy<Person>(collection).matching(spec);
* Java persistence strategy
new JpaRepositoryStrategy<Person>(Person.class).matching(spec);

== LICENSE

(The MIT License)

Copyright (c) 2011 Jeroen van Schagen ([email protected])

Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
'Software'), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.